Dingwall Castle is believed to have been established by Norse settlers in the area in the 11th century. During the Wars of Scottish Independence the castle was garrisoned by the forces of king Edward I of England. However it was later captured by Scottish forces for king Robert I of Scotland (Robert the Bruce) led by Uilleam II, Earl of Ross.
From the castle, the Earl of Ross (chief of Clan Ross) led the men of Ross to fight against the English at the Battle of Bannockburn in 1314. As a reward in 1321 King Robert granted Dingwall Castle with the town and lands of Dingwall to the Earl of Ross.
In 1370 a feud arose between William de Moravia, 5th Earl of Sutherland (chief of Clan Sutherland) and Aodh Mackay (chief of Clan Mackay). A meeting was arranged for them to meet at Dingwall Castle to resolve their issues. However Aodh Mackay and his son Donald Mackay were both murdered in the castle while they were asleep by Nicholas Sutherland, brother of the Earl of Sutherland.
In 1411 Domhnall of Islay, Lord of the Isles (chief of Clan Donald) captured Dingwall Castle as part of his attempt to seize the title of the Earldom of Ross. This took place shortly before the Battle of Harlaw. In 1438 the next successive Clan Donald chief, Alexander of Islay, Earl of Ross was officially recognised as the Earl of Ross and took up his residence at Dingwall Castle. His son, John of Islay, Earl of Ross was not as successful; the Earldom of Ross was confiscated from him and the castle became a royal possession once more in 1475. John Munro, 11th Baron of Foulis was then made governor of the castle, who in turn was succeeded by Andrew Munro, 2nd of Milntown. The next governor in 1488 was Sir James Dunbar.
In 1507 Andrew Stewart, Bishop of Caithness carried out improvements after the castle had been assaulted by the MacDonalds and Mackenzies. The Crown abandoned Dingwall Castle in about 1600 and it eventually fell into a ruin. The castle ceased to be maintained after the death of king James VI of Scotland in 1625. It was used as a quarry until 1817 when it was finally levelled and only a few fragments remain.
A tunnel still exists that runs from the site of Dingwall Castle to the basement of nearby Tulloch Castle. The tunnel has now collapsed, but it is possible to view this passageway through an air vent on the front lawn of Tulloch Castle's grounds.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.